CVE-2025-26685: Improper authentication in Microsoft Defender for Identity allows an unauthorized attacker to perform spoofing

This month

MEDIUM 6.5WATCHLISTMITIGATE

CVE-2025-26685 is a medium-severity flaw (CVSS 6.5) affecting defender for identity. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper authentication in Microsoft Defender for Identity allows an unauthorized attacker to perform spoofing over an adjacent network.

Why this priority

On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-287
Published	2025-05-13
Last modified	2026-06-17

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-05-13 17:15 UTCPublished CVE record published
2026-06-17 09:02 UTCUpdated Record last modified

microsoft defender for identity MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy defender-for-identity || rpm -q defender-for-identity || defender-for-identity --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-26685?

defender for identity: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-26685 being exploited?

CVE-2025-26685 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-26685 affect?

CVE-2025-26685 affects defender for identity. Severity is medium (CVSS 6.5). Improper authentication in Microsoft Defender for Identity allows an unauthorized attacker to perform spoofing over an adjacent network.

How urgent is CVE-2025-26685?

Priority 41/100. On your watchlist

Software pages

Windows Defender vulnerabilities

References

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